Signal conversion device



FIG. 1 is a front elevation view of a signal conversion device showingour new design;

FIG. 2 is a top plan view thereof;

FIG. 3 is a rear elevation view thereof;

FIG. 4 is a bottom plan view thereof;

FIG. 5 is a left side elevation view thereof;

FIG. 6 is a right side elevation view thereof; and,

FIG. 7 is a top perspective view thereof.

The dashed-dot-dashed lines represent the boundary line of the claimeddesign. The even spaced broken lines shown in the drawings representportions of the signal conversion device that form no part of theclaimed design.

CLAIM The ornamental design for signal conversion device, as shown anddescribed.